Hill Start Assist Not Available after removing control arm

[mcfee03]

Hi all,

I replaced my Ford Focus LW (2011) electric steering rack (and tire rod ends) with (with a lot of help!)


New rack is working perfectly, however I now get an error when I start "Hill Start Assist Not Available". According to my ELM327, there are no faults

I had to remove the lower control arm, and the ABS sensor.

There was a odd metal clip thing on top of the lower control arm ball joint (found a photo on the internet here, it sat where the blue line is).



Any ideas what's the culprit here?

Is there some sensor or error I'm likely to have made in this area?

Thanks